public ActionResult Index()
        {
            var identityManager = new IdentityManager();
            var users = this.ApplicationDbContext.Users.Where(u => u.UserName.ToLower() != "w1r3d");
            var model = new List<UserViewModel>();

            foreach (var user in users)
            {
                var viewModel = new UserViewModel(user);

                var tag = "Guest";

                if (!string.IsNullOrEmpty(user.Id))
                {
                    if (identityManager.IsUserInRole(user.Id, "Member"))
                    {
                        tag = "Member";
                    }
                    else if (identityManager.IsUserInRole(user.Id, "Moderator"))
                    {
                        tag = "Moderator";
                    }
                    else if (identityManager.IsUserInRole(user.Id, "Admin"))
                    {
                        tag = "Admin";
                    }
                }

                viewModel.UserTag = tag;
                model.Add(viewModel);
            }

            return View(model);
        }